if you're in first season, should sold several players in positions : ST,CM,LW,RW,RB,LB,CB and buy :
ST : Quintero (2,5m)
CM : Bressan (1m)
LW : Mouche (100k)
RW : Tom (Litex-200k)
RB : Bandalovski (100k)
LB : Zanev (100k)
CB : Gioda (100k)
All players are good at Premier League !